What reagent can be used to convert 1-hexyne to 2- hexynes? O3/2n/H3O BH3/H2O2/O

Question

What reagent can be used to convert 1-hexyne to 2- hexynes? O3/2n/H3O BH3/H2O2/OH PCC(pyridnium chloroximate) HgSO4/H2SO4/H2O Identify three reagents from your "Reagents Sheet" that canvert to following compound? For a compound of molecult formula C4H3O2, draw an isomer that will show only one singlet peak in its (H NMR sopectrum) The Spectrum shown below moa likelv represents what class of componends? Which of the following compound will show the hue pcai 57 in its mass spectrum? CH_3CH_2CH_2CH_2CH_2CH_3 (CH_3)2CHCH_2CH_3 (CH_3)3CCH_2CH_3 (CH_3)2CHCH(CH_3)2 How many negative peaks would the following compound show in DEPET, 90? (CH_3)3CCH_2CH_3 The IR spectrum shown below most likely belongs to what class of compounds?

Explanation / Answer

46. To convert 1-hexyne to 2-hexenone we would use,

(D) HgSO4/H2SO4/H2O [oxymercuration]

47. To convert styrene into the given compound we would use,

a) BH3, THF [hydroboration]

b) H2O2, NaOH [hydrolysis of borane to alcohol]

b) PCC [functional groups transformation of OH to aldehyde]

48. compound molecular formula not visible.

50. Of the given molecules the one which would give 57 as base peak,

(c)

for tBu group

51. Dept-90 shows only CH peaks all +ve, so none would be seen as -ve. It is in dept-135 we would see -ve peaks for CH2's.

52. The IR shown below pronanly belongs to an aromatic ester.

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